Improvement in bobbin-winders for sewing-machines



UNITED STATES PATENT OEEIOE.

ROBERT H. sMITH, OE BALTIMORE, MARYLAND, AssIGNOR To HIMsELE AND `JAMES B. sANNER, OE sAME IJLAGE.

IMPROVEMENT IN BOBBlN-WINDERS FOR SEWING-MACi-HMESe Specification kforming part of Letters Patent No. 115,124, dated May 23, i871.

To all whom 'it may concern:

Be it known that I, ROBERT H. SMITH, of Baltimore, in thecounty of Baltimore and State of Maryland, have invented anew and Improved Self- Filling Bobbin- Winder for Sewing-Machines; 'and I do hereby declare the following` to be a full, clear, and exact description ot' the same, reference being had to the accompanying drawing making a part of' this specification, in which Figure 1 is a side elevation, and Fig. 2 is a transverse vertical section.

This invention relates/to improvements in the class ot' bobbin or spool-winders in which a ri ght-andlett-hand screw-shaft is employed, to cause the thread or yarn-guide to traverse the bobbin from one end to the other; and the invention consists in a thread-guide, which. is attached to a carriage so constructed as to rest and slide upon two horizontal parallel rods, and provided with a recess containing a spring, and also a Chaser which is forked at` its upper end, and works in the threads of I manner. d is the live spindle, and e the dead spindle, which sustain the bobbin j'. h is the pinion on the live spindle, which, gearing with the spur-wheel i on the shaft a, communicates i to the latter the motion derived by the live spindle from the fly-wheel of the sewing-machine.` m mane two parallel rods, extending from 011e standard, c, to the other, beneath the shaft a. k is a carriage, provided with ears l, by means of which it is hung between therods m. n is a cha-ser placed within the carriage 7c, and extending above the same, being pressed upward by a spring, o, so far that the fork r on the top of the chaser bears against the screw b. s is an arm extending from one side of the carriagek downward beneath the bobbin. t is a thread-guide at the end of the arm s, through which the thread passes from the spool to the bobbin.

The rotation of the shaft a causes the fork 1' to travel along the screw b until it reaches the end of the same, where the fork passes from the thread it was following into the other thread of the screw, andis by that, without any perceptible stoppage, moved in the opposite direction backward along the shaft; arrived at the other end of the screw, the same thing takes place again. In short, the fork is made to reciprocate back and forth by the alternation of therightand-left screw-threads.`

This motion the fork imparts to the carriage and the carriage imparts it to the tl1readguide, which is thus enabled to lay the thread evenly upon the bobbin. The chaser is so arranged in the socket as to oscillate slightly on its axis, and is thus enabled to vchange from one thread .to the other at the end of each movement. The spring o both keeps theforkof the chaser in close engagement with the threads of the screw-shaft andholds the carriage down to the rods m m.

Having thus described my invention, what 

